Hello. I don't seem able to run PSE17 on my new macbook.
OS: BigSur 11.6
Yes: you have to buy the latest version. That's about it.
Cheers. I suspected this.
Apple killed off support / compatibility for programs that contained 32 bit satuff in them.
New versions usually come out anytime from early October to mid November- you may want to hold off purchasing till them.
Give it (PSE 2021) a whirl with a free 30 day trial: download size is typically around 3-4 GB.
Try Adobe Photoshop Elements 2021